When you practice your presentation, you can record how much time that you need to present each slide. When you deliver your presentation, you can use the timings to advance slides automatically. If you save your presentation as a movie file, the timings can be used to advance slides automatically.
Do any of the following:
 | Rehearse your presentation |
As you rehearse, the timer records the amount of time you spend on each slide and the total amount of time spent on all slides. The timer automatically starts when you enter presenter view.
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On the Slide Show tab, under Presenter Tools, click Rehearse.
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Begin to practice your presentation.
When you finish practicing the content for each slide, click the right or left arrow 
to advance to the next or previous slide.
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When you reach the last slide or exit presenter view, PowerPoint
prompts you to save the timings.
| Pause, start, or reset the timer |
The timer automatically starts when you enter presenter view; however, you can pause and then restart the timer if you need to stop to type notes for the current slide or take a break.
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Do one of the following:
To | Do this |
|---|
Pause the timer | Click  |
Start or continue the timer | Click  |
Reset the timer to zero for the current slide | Click  |
 | Notes |
| |
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When you reach the last slide or exit presenter view, PowerPoint
prompts you to save the timings.
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Rehearsed slide timings are not turned on by default. If you want to use the timings as you present, you can turn the timing on before you play the slide show. On the Slide Show tab, under Set Up, select the Use Timings check box.
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| Add speaker notes while you rehearse |
On the left side of the notes pane, you can see any speaker notes that you entered for the current slide when you created the presentation. However, you can also type additional notes while you rehearse.
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Click to pause the timer.
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Click inside the notes pane on the right, and then type your meeting notes.
| Note When you exit presenter view, the additional notes are appended to the end of the notes for the slide that was in view when you typed them. |
